PURLIN & GIRT DESIGN MANUAL - Metroll® Purlin & Girt Design Manual 010117 3 Metroll MEGASPAN®...

PURLIN & GIRT DESIGN MANUAL

MEGAspan® Purlin & Girt Design Manual 010117 3

Metroll MEGASPAN® purlins are our range of performance enhanced Zed & Cee purlins. The MEGASPAN’s profile has been optimized and can deliver capacity improvements of more than 20% compared to standard purlins.

The geometry of the purlin has been altered slightly, and optimised to each profile size to ensure the most efficient section is used for each purlin size.

It is important that standard purlins from Metroll or other suppliers ARE NOT substituted for designs utilising information from this Megaspan design manual. As Megaspan is a higher performance section, standard purlins will not deliver the same load capacities and hence may be under-designed and potentially unsafe.

ApplicationsMetroll Megaspan purlins and girts are used primarily in the design of sheds, industrial and commercial buildings. The sections are typically used to support roof and wall sheeting in these buildings.

CONTENTS

Design & SpecificationMaterials .......................................................................................................................................4Corrosion Protection & material compatibility ...............................................................................4Hole Punching ..............................................................................................................................4Product Range...............................................................................................................................5 Fascia Purlin ..................................................................................................................................6 Expansion Joints ...........................................................................................................................6 General Design Assumptions ........................................................................................................7Purlin Dimensions..........................................................................................................................8Dimensions (table).........................................................................................................................9Cee Section Properties (table) ......................................................................................................9Zed Section Properties (table) .......................................................................................................9Tolerances ..................................................................................................................................10Structural lapping.........................................................................................................................10Laps for unequal Spans...............................................................................................................10Bridging General & Hole Locations .............................................................................................10Member Weight ...........................................................................................................................11Deflection.....................................................................................................................................11Cleat Connections .......................................................................................................................11Bolts.............................................................................................................................................12Point Loads..................................................................................................................................13Storage and Precautions During Erection ...................................................................................14Safe Work Practices ....................................................................................................................14General Information ....................................................................................................................14

Safebridge Overview & compatibility ...........................................................................................................15Key Benefits ..............................................................................................................................15Key design elements ..................................................................................................................15Design Considerations ..............................................................................................................16

Design Capacity TablesHow to useSingle Spans ......................................................................................................................... 18-19Two Span Continuous (unlapped) ......................................................................................... 20-21Two Span Lapped.................................................................................................................. 22-23Three Span Lapped ............................................................................................................... 24-25Five Span Lapped ................................................................................................................. 26-27

Bridging System ........................................................................................................... 28-35

Notes .................................................................................................................................. 36-37

Disclaimer ..............................................................................................................................38

ABOUT THE PRODUCT

MEGAspan® Purlin & Girt Design Manual 0101174

*Note: Standard centres in Victoria for 150 section is 70mm.

Alternative hole sizes, shapes and centres are available onenquiry.

D A h

mm mm mm

100 40 18 x 22

150 60* 18 x 22

200 110 18 x 22

250 160 18 x 22

300 210 22 round

350 260 22 round

400 310 22 round

35 minimum

35

A

h

DA

D

h

PURLIN SIZE AISC CENTRES

MaterialsMetroll Megaspan Purlins and Girts are manufactured from hi-tensile (G450, G500 or G550) galvanised steel, with a minimum Z350 galvanised coating (350g/m2) conforming to AS 1397.

Corrosion Protection and Material CompatibilitySome building materials and environmental conditions can be detrimental to coated steel products irrespective of the product thickness. These include contact with or exposure to runoff from:

• Industrial, agricultural, marine or other aggressive atmospheric conditions

• Incompatible metals such as lead or copper

• Building materials subject to cycles of excessive moisture content such as non seasoned timber

• Materials which have been treated with preservatives such as CCa or tanalith treated sections.

The standard Z350 (350g/m2) galvanised coating will provide a long and trouble free life for enclosed buildings and open sided rural applications in a non - aggressive environment. For more severe corrosive environments a Z450 (450g/m2) will be required. This heavier coated product is available subject to minimum order quantities and extended lead times.

I

Hole PunchingMetroll purlin sections (Zed and Cee) are normally supplied with holes punched to the Australian Institute of Steel Construction (AISC) guide except in Victoria where 150mm sections are punched to the Structural Steel Fabricator Association Victoria recommendations (70mm centres).

Holes are required at cleat supports, laps, bridging points or as detailed on detail sheets supplied prior to manufacture. The preferred method of dimensioning is hole centre to hole centre rather than referenced from one end. An overall purlin length is required to provide a data entry dimensional check.

DESIGN & SPECIFICATION


Product RangeThe diagrams and tables below illustrate the sizes andthicknesses readily available for purlin and girts. Shapesother than standard Cee and Zed sections may be subjectto minimum order requirements and extended lead times.

For sections outside the standard range please contact yourlocal Metroll office.

R5L

D

L

B

t

Standard C Section Downturn Lip C Section

R5L

D

L

t

R5L

D

L

F

t

Nestable C Section(box configuration)

E

R5L

D

L

F

t

Standard Z Section(uneven flange)

E

R5L

D

L

E

t

Lappable Z Sections(alternative bays)

F

Upper Purlin Lower Purlin R5L*

D

E

t

E

L** Lip approximately 2mm longer than standard

B

METROLL PURLINS and GIRTS – C & Z SECTION SIZE and MASS RANGE

Section WebD

mm

FlangeB

mm

FlangeE

mm

FlangeF

mm

LipL

mm

Thicknesst

mm

Mass

kg/m

C/Z100-10

C/Z100-12

C/Z100-15

C/Z100-19

C/Z150-12

C/Z150-15

C/Z150-19

C/Z150-24

C/Z200-15

C/Z200-19

C/Z200-24

C/Z250-19

C/Z250-24

C/Z300-24

C/Z300-30

C/Z350-30

C/Z400-30

102

102

102

102

152

152

152

152

203

203

203

254

254

300

300

350

51

51

51

51

64

64

64

64

76

76

76

76

76

96

96

125

49

49

49

49

61

61

61

61

74

74

74

74

74

93

93

121

53

53

53

53

65

65

65

66

79

79

79

79

79

100

100

129

12.5

13.0

14.0

15.0

15.0

16.0

17.0

18.5

16.0

19.5

21.0

19.0

20.5

28.0

31.5

30.0

1.0

1.2

1.5

1.9

1.2

1.5

1.9

2.4

1.5

1.9

2.4

1.9

2.4

2.4

3.0

3.0

1.77

2.11

2.61

3.29

2.90

3.59

4.51

5.62

4.50

5.74

7.21

6.50

8.17

10.18

12.69

15.16

400 129 121 133 30.0 3.0 18.70


Section Configuration Thickness mm Mass kg/m150 12 Cee / Zed 1.2 2.86150 15 Cee / Zed 1.5 3.55150 19 Cee / Zed 1.9 4.48150 24 Cee / Zed 2.4 5.81

200 12 * Cee / Zed 1.2 3.61200 15 Cee / Zed 1.5 4.46200 19 Cee / Zed 1.9 5.69200 24 Cee / Zed 2.4 7.39

250 15 * Cee / Zed 1.5 5.16250 19 Cee / Zed 1.9 6.45250 24 Cee / Zed 2.4 8.37

300 19 * Cee / Zed 1.9 8.01300 24 Cee / Zed 2.4 10.11300 30 Cee / Zed 3.0 12.66

350 19 * Cee / Zed 1.9 9.64350 24 * Cee / Zed 2.4 12.23350 30 Cee / Zed 3.0 15.15

* Long lead times and minimum quantities may apply, check with your local Metroll branch.

METROLL MEGASPAN PURLINS & GIRTS - SECTION SIZE AND MASS RANGESection Size and Mass Range

* Long lead times and minimum quantities may apply, check with your local Metroll branch.


Metroll Fascia PurlinFascia Purlin design varies significantly throughout Australia.Different applications demand different section size andconfiguration.

Metroll manufacture a range of fascia purlins including thepopular FP fluted series (fluted web adds strength andprovides a flush external face when used with Metroll flatheaded fascia bolts). The added advantages of this sectioninclude downturned lip for wall fixing and variable upturnedtop flange for roof pitches from 50 to 300.

It is also common practice to use a standard Cee sectionin fascia applications. The Cee purlin can be supplied in astandard configuration or with the top flange bent up to suitthe roof slope.

Expansion JointRoof sheeting lengths are limited by several issues. Thermalexpansion, transport limitations and practical handling arethe main issues governing maximum sheet lengths. Thetable below provides recommended maximum sheet lengths.This may vary from State to State so please contact yournearest Metroll office for appropriate advice.

Because buildings are often designed with roofing runslonger than those illustrated above, Expansion Joints arenecessary. The illustration below shows a typical expansionjoint detail.

METROLL PURLIN & GIRTSMAXIMUM ROOF SHEET LENGTHS

Colour Through Fixed Concealed Fix

Light 25.000 metres 33.000 metres

Dark 17.000 metres 25.000 metresvariable angle

holes 18 x 22

recess 34 x 10

upturned lip

2095

30

d

c

ba

FASCIA PURLIN

230 Plain

230 Fluted

260 Plain

260 Fluted

a

230

230

260

260

b

110

110

160

160

c

65

65

50

50

d

50

50

60

60

Fascia Purlins not available at all locations.

Sealed angle flashing attachedto the end of lower sheets

Pans of upper metal sheetsto be turned down

Pans oflower metal sheets

to be turned up

Baffle flashing to finish shortof end of lower sheet.

Difference in cleat heightto be rib height plus 15mm

300



General Design Assumptions The tables given in this brochure are for limit state capacity, which means that any load beyond the tabulated loads will cause the member to cease to fulfil its intended function. This may mean reaching a limit state for collapse or loss of structural integrity. The Limit State Capacity Tables for various purlin combinations shown in this publication will provide economic design solutions for most projects. In special projects a more optimal design can be obtained by the variation of the combinations such as:

● Material specifications

● Bolt specifications & number

● Lap length

● Bridging quantity

● Span range

● Reduced or enlarged end spans

● Cantilevers at one or both ends of the configuration

● Loading

Design calculations have been based on AS/NZS 4600:2005 Cold formed steel structures, and follow the criteria established by industry best practice.

The assumptions inherent in the code provisions and validated by them include:-

● Self-weight is not included in the design load tables. Self-weight shall be added to any load cases assessed.

● Capacities are calculated on the basis of loading applied to the flange of the section, where the cladding, screw fixed to the flange, provides a minimum level of rotational restraint of 100000Nmm/mm.

● The Z shaped section behaves as an equivalent C shaped channel in the strong axis.

● The design assessment includes consideration of distortional buckling

● For all systems, loading is assumed as uniformly distributed and acting on all spans simultaneously. All other load configurations must be specifically designed.

● Where multiple spans are specified, these are of equal dimension.

● All section properties stated are for full sections, (holes not deducted from the web).

● The loading condition diagrams show the loads applied to the cladding, transmitted via screw fixing into the top flange and acting in the direction shown by the arrows. This defines the “inward” and “outward” load directions.

● For Serviceability conditions, the limiting deflection is Span/150.

Outward Load

Loading Conditions

Inward Load

Loading Conditions



Design Assumptions DisclaimerThis publication is intended to provide accurate information with regard to Metroll Megaspan “Z” sections. It does not constitute a complete description of the goods, nor an explicit statement about suitability for any particular purpose. Data is provided only as a guide; Metroll Pty Ltd and Blueprint Consulting Engineers Ltd do not accept any liability for loss or damage suffered from the use of the data in this publication.

Use of the ManualReal applied loads must be considered along with the stated capacities in this manual, when selecting purlins. All spans are considered loaded concurrently and no allowance has been

made for uneven or skip loading. Where this is likely, or where loading conditions vary from those designed for in this manual, the Structural Engineer should verify compliance independently with AS/NZS 4600:2005.

While real loading may be less than the stated capacity in this manual, this may not necessarily ensure competency of the selected system. Member adequacy is dependent on the maximum moments applied and the moment profile within the member span.

These design actions can vary widely under real - project specific - applied loads and it is the responsibility of the project Design Engineer to verify their purlin selection is compliant with AS/NZS4600:2005 and AS/NZS 1170 assessed loading.

y x

L

R5

Origin Centre of GravityShearCentre D

x x

t D/2

L

y B

xo

Note : x, y axes coincide withx', y' axes (respectively)

Fy'

y

L

R5D/2

t

Origin

x D x'

αx'

x

y

L

y' y E

Purlin Dimensions




Dimensions and properties for Metroll Megaspan Zed Purlins & Girts

Area (mm2)

Slope of principal

axes

D t IX' IY' ZX' ZY' IX IY ZX ZY rX rY J (mm4) IW (mm6) x y x y βx βy α

x106 mm4 x103 mm4 x103 mm3 x103 mm3 x106 mm4 x103 mm4 x103 mm3 x103 mm3 x109 mm6

Z150 150 1.2 354 1.22 0.29 16.13 5.01 1.40 0.11 15.70 3.24 58.73 28.54 169 1.14 1.28 1.26 1.95 9.53 -16.62 15.40 -21.79°150 1.5 443 1.52 0.36 20.09 6.30 1.74 0.14 19.59 4.06 58.55 28.55 331 1.42 1.28 1.26 1.97 9.56 -16.68 15.35 -21.86°150 1.9 561 1.90 0.46 25.28 8.04 2.18 0.18 24.72 5.16 58.27 28.54 672 1.81 1.29 1.26 1.99 9.60 -16.76 15.27 -21.97°150 2.4 708 2.38 0.58 31.68 10.24 2.73 0.22 31.08 6.53 57.94 28.54 1353 2.28 1.30 1.25 2.02 9.65 -16.86 15.18 -22.09°

Z200 200 1.2 444 2.70 0.47 26.68 6.80 2.97 0.19 25.78 4.63 77.91 32.60 213 3.32 1.43 1.61 2.14 12.63 -22.51 20.08 -18.41°200 1.5 555 3.36 0.59 33.27 8.55 3.70 0.24 32.19 5.81 77.75 32.62 415 4.16 1.46 1.58 2.27 12.74 -22.57 20.02 -19.07°200 1.9 713 4.28 0.79 42.48 11.53 4.74 0.32 41.28 7.73 77.46 33.32 855 5.64 1.46 1.59 2.24 12.68 -22.57 19.57 -18.99°200 2.4 900 5.35 1.00 53.29 14.65 5.94 0.41 51.90 9.78 77.09 33.30 1718 7.12 1.46 1.58 2.27 12.74 -22.69 19.48 -19.07°

Z250 254 1.5 638 5.92 0.60 46.27 8.63 6.25 0.28 45.06 6.28 96.40 30.62 477 7.09 1.25 1.78 1.92 15.93 -29.26 24.22 -13.42°254 1.9 808 7.47 0.76 58.42 11.00 7.88 0.35 56.95 7.99 96.17 30.62 969 8.99 1.26 1.78 1.94 15.99 -29.38 24.14 -13.46°254 2.4 1020 9.37 0.96 73.43 13.98 9.88 0.44 71.67 10.13 95.83 30.61 1948 11.35 1.26 1.78 1.97 16.07 -29.53 24.05 -13.51°

Z300 300 1.9 998 13.00 1.61 86.21 18.49 13.89 0.71 83.71 13.16 114.16 40.11 1174 26.69 1.33 1.72 2.06 14.94 -27.25 22.30 -15.08°300 2.4 1260 16.36 2.03 108.7 23.55 17.49 0.90 105.70 16.73 113.95 40.16 2371 33.79 1.33 1.71 2.08 14.99 -27.35 22.20 -15.13°300 3.0 1575 20.14 2.51 134.1 29.30 21.54 1.11 130.50 20.74 113.08 39.92 4570 41.89 1.33 1.72 2.11 15.10 -27.54 22.18 -15.17°

Z350 350 1.9 1207 22.27 3.37 126.8 29.88 24.20 1.44 121.90 21.00 135.86 52.84 1447 74.01 1.38 1.65 2.08 13.41 -24.15 20.89 -16.92°350 2.4 1524 27.99 4.25 159.5 37.89 30.42 1.82 153.60 26.56 135.52 52.82 2909 93.47 1.38 1.65 2.09 13.45 -24.23 20.84 -16.97°350 3.0 1905 34.77 5.31 198.5 47.57 37.81 2.26 191.40 33.27 135.10 52.79 5668 116.80 1.39 1.64 2.11 13.50 -24.32 20.78 -17.02°

Dimensions and properties for Metroll Megaspan Cee Purlins & Girts

Area (mm2)

D t IX' IY' ZX' ZY' IX IY ZX ZY rX rY J (mm4) IW (mm6) x y x y βx βy

x106 mm4 x103 mm4 x103 mm3 x103 mm3 x106 mm4 x103 mm4 x103 mm3 x103 mm3 x109 mm6

C150 150 1.2 354 1.22 0.17 16.37 4.51 1.22 0.17 16.37 4.51 58.66 21.95 169 0.88 18.01 -28.35 160.40150 1.5 443 1.51 0.21 20.38 5.68 1.51 0.21 20.38 5.68 58.47 21.92 331 1.11 18.05 -28.45 159.70150 1.9 561 1.90 0.27 25.64 7.24 1.90 0.27 25.64 7.24 58.21 21.87 672 1.41 18.11 -28.58 158.60150 2.4 708 2.37 0.34 32.13 9.24 2.37 0.34 32.13 9.24 57.87 21.80 1353 1.81 18.17 -28.73 157.30

C200 200 1.2 444 2.70 0.30 27.12 6.18 2.70 0.30 27.12 6.18 77.92 25.84 213 2.49 19.82 -31.86 212.20200 1.5 555 3.36 0.37 33.82 7.77 3.36 0.37 33.82 7.77 77.77 25.83 415 3.12 19.88 -31.96 211.40200 1.9 713 4.28 0.49 43.17 10.50 4.28 0.49 43.17 10.50 77.47 26.19 855 4.31 20.57 -33.06 208.60200 2.4 900 5.35 0.61 54.16 13.35 5.35 0.61 54.16 13.35 77.11 26.12 1718 5.47 20.62 -33.21 207.20

C250 254 1.5 638 5.93 0.40 46.94 8.03 5.93 0.40 46.94 8.03 96.41 25.11 477 5.27 17.46 -29.66 270.30254 1.9 808 7.47 0.51 59.27 10.24 7.47 0.51 59.27 10.24 96.19 25.08 969 6.69 17.51 -29.77 268.90254 2.4 1020 9.37 0.64 74.49 13.03 9.37 0.64 74.49 13.03 95.85 25.03 1948 8.47 17.56 -29.89 267.30

C300 300 1.9 998 13.00 1.05 87.22 17.06 13.00 1.05 87.22 17.06 114.16 32.41 1174 20.00 23.67 -39.62 312.20300 2.4 1260 16.37 1.32 110.00 21.75 16.37 1.32 110.00 21.74 113.98 32.40 2371 25.40 23.76 -39.76 310.40300 3.0 1575 20.14 1.63 135.60 27.07 20.14 1.63 1631.00 27.07 113.08 32.18 4570 31.57 23.73 -39.89 309.00

C350 350 1.9 1207 22.28 2.16 128.00 27.17 22.28 2.16 128.00 27.17 135.89 42.30 1447 55.08 31.64 -51.43 368.10350 2.4 1524 27.99 2.72 161.10 34.47 27.99 2.72 161.10 34.47 135.52 42.25 2909 69.74 31.70 -51.58 366.80350 3.0 1905 34.77 3.39 200.40 43.30 34.77 3.39 200.40 43.30 135.10 42.17 5668 87.43 31.77 -51.75 365.10

Dimensions Zed Purlins & Girts Dimensions Cee Purlins & Girts

D tFlange Over

Flange Under D t Flange

Z150 150 1.2 60 55 Z150 150 1.2 57150 1.5 60 55 150 1.5 57150 1.9 60 55 150 1.9 57150 2.4 60 55 150 2.4 57

Z200 200 1.2 72 66 Z200 200 1.2 69200 1.5 72 66 200 1.5 69200 1.9 72 66 200 1.9 69200 2.4 72 66 200 2.4 69

Z250 254 1.5 72 66 Z250 254 1.5 69254 1.9 72 66 254 1.9 69254 2.4 72 66 254 2.4 69

Z300 300 1.9 90 84 Z300 300 1.9 87300 2.4 90 84 300 2.4 87300 3.0 90 84 300 3.0 87

Z350 350 1.9 116 110 Z350 350 1.9 113350 2.4 116 110 350 2.4 113350 3.0 116 110 350 3.0 113

Monosymmetry constant

Coordinates of centroid (mm from

flange centre)

Coordinates of shear centre (mm

from flange centre)

Column PropertiesSecond Moment of Area rectangular

(mm4)

Section Modulus rectangular (mm3)

Radius of GyrationSecond Moment of Area principal (mm4)

Section Modulus principal (mm3)

Column Properties Coordinates of centroid (mm from

flange centre)

Coordinates of shear centre (mm

from flange centre)

Monosymmetry constant

Second Moment of Area rectangular

(mm4)

Section Modulus rectangular (mm3)

Second Moment of Area principal (mm4)

Section Modulus principal (mm3)

Radius of Gyration

Section Properties


TolerancesAll sections will be produced with the following tolerances:

Overall length ± 5mm

Flange width ± 2mm

Depth ± 2mm

Hole Centres ± 2mm

Please contact Metroll if any variation from the above tolerances is required.

Structural LappingA feature of Metroll Megaspan Zed sections is one broad and one narrow flange proportioned so that two sections of the same size, when one is rotated by 180 degrees, bolt snugly together, making them suitable for lapping.

Structural continuity results in better economy but lapping provides two thicknesses of material over interior supports, increasing the strength of the sections where bending moments and shears are maximum, improving the load capacity and rigidity of the system. The Cee sections cannot be lapped.

All lapped Zed section configurations generally require a total lap length (bolt centre to bolt centre) of 15% of the span (to the nearest 50mm).

Structural laps provide greater load carrying capacity to the section. The lap/span ratio must be 15% or greater and all laps should use six bolts in the connection including two bolts in the bottom flange. Zed sections can be lapped in any thickness combination and allows heavier, stronger sections to be used in end bay applications.

Laps For Unequal SpansAs with equal spans, the total lap length must be 15%.However, for unequal spans this means 15% of the averagespan and the lap is not equally spaced about the support. Inpractice, 7.5% of the longer span must be applied to theshorter purlin (as this material ends up in the longer span).Conversely, 7.5% of the shorter span can be applied to thelonger span. This is demonstrated on the example below.

A satisfactory alternative is to apply the 15% lap based onthe longer of the spans.

750 12 000

Example not to scale10 000 900

Bridging General & Hole LocationsThe Limit State Capacity Tables provide design solutions for an equal number of rows of bridging in each span. Provision is made for 0, 1, 2 or 3 rows of bridging.

In some combinations of span configuration and loading there is no benefit in increasing the number of rows of bridging.

Metroll recommends that bridging be installed such that the maximum unbraced length is 20 x D (where D is the purlin web height), or 4000mm whichever is the least. In addition to enhancing purlin performance this requirement assists with the erection of roof sheeting. Location of the bridging must be as shown below (to the nearest 50mm), or as determined by the design engineer by computation.


Purlin Size

Recommended Maximum Bridging Spacing

Max Bridging Spacing

100mm150mm

200, 250, 300, 350, 400mm

2000mm3000mm4000mm

RAFTER ORSTEEL FRAME

BROAD FLANGE

NARROW FLANGE

NARROWFLANGE

BROADFLANGE

15% OF SPAN


Single or Internal Spans

Double or End Spans

1 RowBridging

SPAN (L)

0.5L 0.5L

Bridging Holes Cleat Holes

2 RowsBridging

0.35L 0.35L0.3L

3 RowsBridging

0.3L 0.2L

End Supports Internal Supports

0.2L 0.3L

1 RowBridging

SPAN (L)

0.58L 0.42L

2 RowsBridging

0.44L 0.30L0.26L

3 RowsBridging

End Supports Internal Supports

0.35L 0.2L 0.2L 0.25L

Member WeightAll Limit state loads are in kN/m. Limit state loads make no allowance for the mass of the member. In some cases, limit state loads are limited by the bolting.

DeflectionThere are no specific rules governing acceptable deflections, though structural codes give guidance. One needs to consider the specific requirements of any structure. It may be necessary to design under more than one load combination. Load stated is calculated to produce a deflection of Span/150 for the critical span. Solutions for other deflection ratios may be obtained using linear proportioning. Where a suspended ceiling is to be installed, such as residential and commercial construction, more stringent deflection limits may be necessary to prevent damage to the ceiling components or joints. Both the End Span and the Internal Span are considered in the analysis of lapped and continuous spans.

Cleat ConnectionsThe Limit State Capacity Tables are based on the sections being fastened through the web to the cleats so that the load path is via the web of the sections.

The connections may be single section thickness such as in end connections, or the internal support connection of continuous configurations. Connections with double section thickness occur at the internal support of lapped configurations.

Each connection consists of two bolts. The bolt specifications (size and grade) will depend on the section size and design load. In some cases, eliminating cleats and bolting directly through the bottom flange of the Zeds and Cees could give savings on number of bolts. The number of bolts used is halved compared with those in conventional cleated connections.

Single cleats are most commonly used with Zed Sections and double cleats with Cees. Double cleats can also be used in applications with a high reaction load to reduce bolt stress and sheer. Extra care is required with hole detailing in a double cleat application to a single purlin. The table below illustrates industry standard cleat sizes including purlin clearances.



P

SimpleSINGLELOAD P

Lapped

Simple2

LOADSLapped

P P P

Simple3

LOADS P P P

Lapped

Simple4

LOADSLapped

Simple5

LOADSLapped

Simple6 OR MORE

LOADSLapped

a P bSimple

SINGLEECCENTRIC a P bPOINT LOAD Lapped

b P P bSimple

TWOSYMMETRICAL b P P bPOINT LOADS Lapped

w = 8bP L2

w = 9.45b(2L-3b)PL3

w = 8abP L3

w = 17.76ab2P L4

Loading condition Diagram Conversion Formulaw = 2P

L

w = 2.22P L

w = 2.67P L

w = 3.16P L

w = 4P

w = 5.12P L

w = 6P

L

w = 3.78P L

w = 4.80P

L

w = 1.22P L

Symmetrical equidistant point loads

L

w = 6.65P L

w = 1.14NP

L

P P

P P

P P P P

P P P P

P P P P P

P P P P P

P P P P P P

P P P P P P

Single eccentric and two symmetrical point loadsLoading condition Diagram Conversion Formula

Size X B+ Y+ T Gap hd W V

100 40 40 105 8 10 18 50 130

150 60* 55† 145 8 10 18 60 140

200 110 55 195 8 10 18 60 140

250 160 55 245 8 10 18 60 140

300 210 65 305 12 20 22 60 140

350 260 65 355 12 20 22 60 140

400 310 75 405 12 20 22 60 140

CLEAT NOMINAL DIMENSIONS (mm)

W VD hole

Single Cleat Double Cleat

80

B

X

t thickness

Y

* 70 mm in Victoria.

† 50 mm in Victoria.

+ when using Down turned Lip purlins or girts the lip length must be added to dimension B and Y. Cleat lengths may be increased in some design situations (e.g. above an expansion joint).

As a guide, increase the cleat thickness by 2mm for each 40mm of additional length.

BoltsThe fastening of sections to cleats is normally by Standard Metroll Purlin bolts. In the Limit State Capacity Tables, where High Strength bolts govern the capacity the loads are marked bold accordingly. In these situations the section capacity is not fully utilised and it may be more economical to select another configuration or change the spacing of the section or increase the bolt number or specification.

Purlin laps must be bolted in the top web hole and the lower flange holes at both ends of the lap. Bolting only the web of lapped purlins does not provide full structural integrity and excessive loads can be placed on the roofing screws that penetrate both purlin thickness in the lap region. The correct size and grade of purlin bolts nominated by the design engineer should be used at all times. Bolts should be fully tightened prior to roof installation and before any loads are applied to the purlins, girts or bridging.

Nominal Section Size (mm) Bolt Specification

100, 150, 200, 250 Standard M12 Purlin Bolt High Strength M12 Purlin Bolt

300, 350, 400 Standard M16 Purlin Bolt High Strength M16 Purlin Bolt


Bolt Specification

Bolts to be snug tightened to a nominal torque of 54Nm.


P

SimpleSINGLELOAD P

Lapped

Simple2

LOADSLapped

P P P

Simple3

LOADS P P P

Lapped

Simple4

LOADSLapped

Simple5

LOADSLapped

Simple6 OR MORE

LOADSLapped

a P bSimple

SINGLEECCENTRIC a P bPOINT LOAD Lapped

b P P bSimple

TWOSYMMETRICAL b P P bPOINT LOADS Lapped

w = 8bP L2

w = 9.45b(2L-3b)PL3

w = 8abP L3

w = 17.76ab2P L4

Loading condition Diagram Conversion Formulaw = 2P

L

w = 2.22P L

w = 2.67P L

w = 3.16P L

w = 4P

w = 5.12P L

w = 6P

L

w = 3.78P L

w = 4.80P

L

w = 1.22P L

Symmetrical equidistant point loads

L

w = 6.65P L

w = 1.14NP

L

P P

P P

P P P P

P P P P

P P P P P

P P P P P

P P P P P P

P P P P P P

Single eccentric and two symmetrical point loadsLoading condition Diagram Conversion Formula

Point LoadsThe Limit state loads given in the tables are essentially uniformly distributed. It is inferred that all design loads will be converted into uniformly distributed values. In some applications the design loads are point loads. All design loads must be converted to uniformly distributed loads. The point-loaded configuration has been equated with uniformly loaded configuration for conversion formulae for single spans and lapped span configurations and are given in the table below as a guide. For continuous unlapped configurations a separate set of conversion formulae would be applicable.

Where;P = Single point load (kN) L = span (m)a = Larger distance from support (m) b = Smaller distance from support (m) w = Equivalent uniform load (kN/m) N = Number of point loads over one span



Storage and Precautions during ErectionErection of purlins and girts should be undertaken in suitable weather conditions by erection crews experienced with this work.

Safe Work PracticesMetroll Meagaspan purlins, girts and bridging members are not designed for walking on. Residual oil from the manufacturing process may be present on these components and slipping can occur. Appropriate lifting equipment and work platforms must be used.

As a minimum:

• Never “walk” on purlins or girts during installation - use appropriate equipment

• Never walk on purlins without safety mesh in place.

• Never walk on bridging

• Always use approved safety harnesses and or other suitable safety equipment during erection.

General InformationWelding Metroll’s purlins, girts and bridging is not recommended. Welding any cold rolled, high tensile material not only affects the material properties but will also remove the galvanised coating which could lead to reduced life of the section.



SAFEBRIDGE

Megaspan purlins are compatible for use with the Safebridge bridging system. When utilising the Safebridge system purlin selection must consider the purlin and bridging spacing nominated below.

SafeBridge is an innovative, award-winning roofing system that can be adapted to almost any Commercial or Industrial roof structure. Fully compliant with the current requirements of BCA Section J, SafeBridge utilises the existing purlin space to provide energy efficient roof insulation without compromising roof height, wind rating or structural integrity.

Safebridge® Key Benefits● Creates a safer roof environment for workers during construction

● Code compliant with BCA/NCC Section J

● Uses the purlin space without elevating the overall roof or facia height

● Suitable for cyclonic and non-cyclonic regions

Key Design Elements

Anticon SB has centre bonded foil lap to protect purlins from condensation

Purlin Keyway - simple roofing screw assembly

Bridge Bar Stabiliser - prevents purlin ‘roll’R0.2 Thermal Break Tape - 10mm thick

Standard Purlin Spacing Bridge Bar Spacing

610mm, 910mm, 1210mm, 1360mm Maximum 1500mm

Purlin and Bridge Bar Spacing


SAFEBRIDGE

Designing for Green Star and Building Code ComplianceMinimum energy efficiency standards for commercial buildings are mandatory in the Building Code of Australia (BCA) and National Construction Code of Australia (NCC). Thermal insulation plays a key role in meeting these requirements and improvements in insulation also contribute to reductions in energy use which is a critical factor in Green Star accreditation. Choosing the right insulation also offers the additional benefits to the occupants of condensation control, dampening noise and controlling heat flow in and out of the building.

To achieve the BCA/NCC Section J thermal insulation values, the roof system must allow sufficient space under the roof sheet for the insulation to recover to its design thickness to provide its rated insulation value. Failure to provide enough space will result in compression of the insulation and reduce its performance.

Safebridge® essentially uses the depth of the purlins to provide a cavity for the insulation to recover to its design thickness, rather than create a space above the purlin using a roof spacer. Through the development of a patented bridging system and keyway, Safebridge® allows the purlin bridging to be set at a predetermined height during the design phase.

Designing for Worker SafetyA unique feature of the system is the applicationof the safety mesh between, rather than over the top of the purlins. This configuration eliminates the need to ‘lap’ safety mesh and cover the purlins, resulting in immediate wire mesh material cost savings. Additionally, this method of assembly allows the use of the Safebridge® Wire Pulley system which not only saves time in applying the wire mesh, but also removes workers from the exposed edge of the roof during construction, greatly increasing their safety.

Design ConsiderationsAs the Safebridge® system is integrated into the purlin and bridge bar assembly, there is little or no change to the roof design. Specified designs primarily need to consider the Safebridge® purlin spacing and bridge bar location relative to other roofing components during the design phase. In summary, Safebridge®:

Designing for Worker Safety● Can achieve high thermal performance in any climate zone (as defined by the BCA/NCC)

● Requires no additional roof spacers to elevate the roof sheet above the purlin

● Retains the structural integrity and load points of the roof interior

● Suits most roof pitches and complex roof designs

● Is available with either foil, decorative or acoustic finishes on the internal faced insulation material

● Can be used in cyclonic regions in conjunction with cyclonic rated components.

Important: Safebridge® relies upon specific purlin spacing listed in Table 4 on the previous page. Please ensure that you consult with Bradford and Metroll early in the design phase to understand the relationship of purlin depth and spacing to R-Value and the BMT relative to your ultimate roof design loads.


How to use Megaspan Purlin & Girt Design Capacity TablesThe design capacity tables indicate the maximum limit state capacity of the sections. The capacities are based on uniformly distributed loads and any point loads need to be converted.

Required loads are established by the project designer using appropriate building codes and standards. Once the outwards and inwards loads required on the purlins and girts are determined the preferred span configuration can be checked by reviewing the tables.

When using the Safebridge system 3 rows of bridging should be selected.

Tables & Span Information

DESIGN CAPACITY TABLES

Span (mm)

Overall purlin length =

span + 70 mm + (Lap/2)

Span (mm) Span (mm)

LapEnd span End span

Span (mm)Span (mm)




span + 70 mm + (Lap)

5 Span Lapped - Design Capacity Table 5A + 5B

Single Span - Design Capacity Table 1A + 1B

2 Span Continuous (unlapped) - Design Capacity Table 2A + 2B





Table 1A: Metroll MEGAspan Design Capacity (kN/m) - SINGLE SPAN: OUTWARD LOADShaded cells denote situations outside Metroll’s standard bridging spacing guidelines. For Safebridge system always use 3 rows of bridging dataCapacities in BOLD & shaded require 8.8 grade bolts

B3/SBBOLD

TABLE: 1A

Metroll MEGAspan Design Capacity (kN/m) - SINGLE SPAN : OUTWARD LOAD

hhB3/SB For Safebridge system always use 3 rows of bridging dataBold Capacities in BOLD & shaded require 8.8 grade bolts

SPAN B0 B1 B2 B3/SB B0 B1 B2 B3/SB B0 B1 B2 B3/SB B0 B1 B2 B3/SB B0 B1 B2 B3/SB B0 B1 B2 B3/SB SPAN3000 3.87 4.72 4.72 4.72 4.95 6.04 6.04 6.04 6.46 8.32 8.32 8.32 8.22 11.24 11.32 11.32 5.34 5.34 5.34 5.34 8.73 8.80 8.80 8.80 30003500 2.27 3.47 3.47 3.47 3.00 4.44 4.44 4.44 3.89 6.11 6.11 6.11 5.04 7.88 8.31 8.31 4.16 4.58 4.58 4.58 5.69 6.46 6.46 6.46 35004000 1.40 2.66 2.66 2.66 1.81 3.37 3.40 3.40 2.37 4.53 4.68 4.68 3.12 5.72 6.37 6.37 2.76 3.83 3.83 3.83 3.68 4.95 4.95 4.95 40004500 2.01 2.10 2.10 2.52 2.69 2.69 3.35 3.70 3.70 4.24 4.97 5.03 3.02 3.02 3.02 3.91 3.91 3.91 45005000 1.50 1.70 1.70 1.90 2.18 2.18 2.50 3.00 3.00 3.18 3.90 4.07 2.37 2.45 2.45 3.17 3.17 3.17 50005500 1.11 1.40 1.40 1.44 1.80 1.80 1.88 2.46 2.48 2.41 3.12 3.37 1.86 2.02 2.02 2.57 2.62 2.62 55006000 0.82 1.18 1.18 1.08 1.49 1.51 1.41 2.00 2.08 1.83 2.52 2.80 1.47 1.70 1.70 2.02 2.20 2.20 60006500 0.61 0.98 1.01 0.80 1.22 1.29 1.05 1.63 1.77 1.39 2.05 2.33 1.16 1.45 1.45 1.59 1.87 1.87 65007000 0.46 0.80 0.87 0.60 1.01 1.11 0.79 1.33 1.53 1.06 1.69 1.96 0.92 1.24 1.25 1.24 1.62 1.62 70007500 0.36 0.65 0.76 0.46 0.83 0.97 0.61 1.09 1.32 0.82 1.39 1.66 0.72 1.04 1.09 0.96 1.41 1.41 75008000 0.28 0.53 0.66 0.36 0.69 0.84 0.48 0.90 1.12 0.65 1.15 1.42 0.57 0.88 0.96 0.75 1.22 1.24 80008500 0.22 0.43 0.58 0.29 0.57 0.72 0.38 0.74 0.96 0.52 0.96 1.22 0.45 0.75 0.85 0.60 1.04 1.10 85009000 0.18 0.35 0.50 0.23 0.47 0.62 0.31 0.61 0.83 0.42 0.79 1.05 0.37 0.64 0.76 0.48 0.88 0.98 90009500 0.14 0.29 0.43 0.19 0.38 0.54 0.25 0.50 0.71 0.35 0.66 0.91 0.30 0.55 0.67 0.39 0.75 0.88 950010000 0.12 0.24 0.37 0.15 0.31 0.47 0.21 0.41 0.62 0.29 0.54 0.78 0.25 0.47 0.59 0.32 0.63 0.79 1000010500 0.10 0.20 0.32 0.13 0.26 0.41 0.18 0.34 0.53 0.24 0.45 0.68 0.21 0.40 0.52 0.26 0.53 0.72 1050011000 0.08 0.17 0.27 0.11 0.22 0.35 0.15 0.28 0.46 0.21 0.38 0.59 0.17 0.34 0.46 0.22 0.45 0.63 1100011500 0.07 0.14 0.23 0.09 0.18 0.30 0.13 0.24 0.40 0.18 0.32 0.51 0.14 0.28 0.41 0.19 0.38 0.56 1150012000 0.06 0.12 0.20 0.08 0.15 0.26 0.11 0.20 0.34 0.16 0.28 0.45 0.12 0.24 0.36 0.16 0.32 0.50 12000

0.10 0.21 0.32 0.13 0.28 0.44 125000.09 0.18 0.28 0.12 0.24 0.39 130000.08 0.16 0.25 0.10 0.21 0.34 135000.07 0.14 0.22 0.09 0.18 0.30 140000.06 0.12 0.20 0.08 0.16 0.26 145000.05 0.11 0.17 0.07 0.14 0.23 15000

SPAN B0 B1 B2 B3/SB B0 B1 B2 B3/SB B0 B1 B2 B3/SB B0 B1 B2 B3/SB B0 B1 B2 B3/SB B0 B1 B2 B3/SB SPAN3000 12.03 12.72 12.72 12.72 15.65 17.49 17.49 17.49 8.12 8.12 8.12 8.12 15.88 16.14 16.14 16.14 20.91 22.47 22.47 22.47 30003500 7.829 9.34 9.34 9.34 10.09 12.85 12.85 12.85 6.96 6.96 6.96 6.96 10.39 11.86 11.86 11.86 13.22 16.51 16.51 16.51 35004000 5.11 7.15 7.15 7.15 6.53 9.84 9.84 9.84 4.97 6.09 6.09 6.09 6.51 9.08 9.08 9.08 8.30 12.64 12.64 12.64 10.42 10.42 10.42 10.42 40004500 5.65 5.65 5.65 7.76 7.78 7.78 5.10 5.10 5.10 7.18 7.18 7.18 9.99 9.99 9.99 9.27 9.27 9.27 45005000 4.49 4.58 4.58 5.96 6.30 6.30 4.13 4.13 4.13 5.81 5.81 5.81 7.99 8.09 8.09 8.15 8.15 8.15 50005500 3.55 3.78 3.78 4.63 5.21 5.21 3.31 3.42 3.42 4.68 4.80 4.80 6.16 6.69 6.68 6.73 6.73 6.73 55006000 2.79 3.18 3.18 3.62 4.37 4.37 2.64 2.87 2.87 3.72 4.04 4.04 4.77 5.62 5.62 5.57 5.66 5.66 60006500 2.20 2.71 2.71 2.85 3.73 3.73 2.11 2.45 2.45 2.89 3.44 3.44 3.69 4.79 4.79 4.61 4.82 4.82 65007000 1.73 2.34 2.34 2.23 3.12 3.21 1.67 2.11 2.11 2.21 2.97 2.97 2.84 4.13 4.13 3.84 4.16 4.16 70007500 1.34 1.98 2.04 1.74 2.62 2.80 1.29 1.84 1.84 1.69 2.58 2.58 2.18 3.51 3.60 3.22 3.62 3.62 75008000 1.04 1.69 1.79 1.36 2.21 2.46 1.01 1.57 1.62 1.31 2.23 2.27 1.69 2.94 3.16 2.71 3.18 3.18 80008500 0.83 1.43 1.58 1.08 1.87 2.18 0.80 1.35 1.43 1.04 1.90 2.01 1.34 2.47 2.80 2.29 2.81 2.82 85009000 0.66 1.22 1.41 0.87 1.58 1.92 0.64 1.15 1.28 0.83 1.62 1.79 1.08 2.07 2.50 1.90 2.46 2.52 90009500 0.54 1.04 1.26 0.71 1.34 1.68 0.52 0.99 1.15 0.67 1.36 1.61 0.87 1.74 2.24 1.56 2.16 2.26 950010000 0.44 0.88 1.12 0.58 1.14 1.47 0.42 0.85 1.03 0.55 1.14 1.45 0.72 1.46 1.97 1.29 1.91 2.04 1000010500 0.37 0.75 0.99 0.49 0.96 1.30 0.35 0.72 0.92 0.45 0.95 1.30 0.60 1.22 1.73 1.08 1.69 1.85 1050011000 0.31 0.63 0.88 0.41 0.81 1.14 0.29 0.60 0.82 0.38 0.79 1.16 0.50 1.02 1.52 0.91 1.50 1.68 1100011500 0.26 0.53 0.78 0.35 0.69 1.01 0.25 0.51 0.73 0.32 0.66 1.03 0.42 0.85 1.33 0.77 1.33 1.53 1150012000 0.22 0.45 0.69 0.30 0.58 0.89 0.21 0.43 0.65 0.27 0.56 0.91 0.36 0.72 1.17 0.65 1.19 1.38 1200012500 0.19 0.38 0.61 0.25 0.50 0.79 0.18 0.37 0.58 0.23 0.48 0.80 0.31 0.62 1.03 0.55 1.06 1.26 1250013000 0.16 0.33 0.54 0.22 0.43 0.70 0.15 0.32 0.52 0.20 0.41 0.70 0.27 0.53 0.90 0.47 0.94 1.14 1300013500 0.14 0.28 0.48 0.19 0.37 0.62 0.13 0.27 0.46 0.17 0.35 0.61 0.23 0.46 0.79 0.41 0.82 1.04 1350014000 0.12 0.25 0.42 0.17 0.32 0.54 0.11 0.24 0.40 0.15 0.31 0.53 0.20 0.40 0.69 0.36 0.72 0.95 1400014500 0.11 0.21 0.37 0.15 0.28 0.48 0.10 0.21 0.35 0.13 0.27 0.47 0.18 0.35 0.60 0.31 0.63 0.87 1450015000 0.10 0.19 0.32 0.13 0.25 0.42 0.09 0.18 0.31 0.12 0.23 0.41 0.16 0.31 0.52 0.27 0.56 0.80 15000

SPAN B0 B1 B2 B3/SB B0 B1 B2 B3/SB B0 B1 B2 B3/SB B0 B1 B2 B3/SB B0 B1 B2 B3/SB SPAN4000 16.46 17.71 17.71 17.71 21.25 24.09 24.09 24.09 8.87 8.87 8.87 8.87 17.94 17.94 17.94 17.94 31.74 31.74 31.74 31.74 40004500 13.99 13.99 13.99 19.03 19.03 19.03 7.89 7.89 7.89 15.94 15.94 15.94 25.08 25.08 25.08 45005000 11.33 11.33 11.33 15.42 15.42 15.42 7.10 7.10 7.10 14.35 14.35 14.35 20.32 20.32 20.32 50005500 9.37 9.37 9.37 12.74 12.74 12.74 6.45 6.45 6.45 12.22 12.22 12.22 16.79 16.79 16.79 55006000 7.87 7.87 7.87 10.71 10.71 10.71 5.92 5.92 5.92 10.27 10.27 10.27 14.11 14.11 14.11 60006500 6.71 6.71 6.71 8.78 9.12 9.12 5.46 5.46 5.46 8.75 8.75 8.75 12.02 12.02 12.02 65007000 5.53 5.78 5.78 7.18 7.87 7.87 5.07 5.07 5.07 7.55 7.55 7.55 10.37 10.37 10.37 70007500 4.57 5.04 5.04 5.90 6.85 6.85 4.43 4.70 4.70 6.57 6.57 6.57 9.03 9.03 9.03 75008000 3.78 4.43 4.43 4.85 6.02 6.02 3.81 4.13 4.13 5.77 5.78 5.78 7.94 7.94 7.94 80008500 3.12 3.92 3.92 3.98 5.34 5.34 3.29 3.66 3.66 4.99 5.12 5.12 6.87 7.03 7.03 85009000 2.56 3.50 3.50 3.26 4.74 4.76 2.85 3.24 3.27 4.34 4.57 4.57 5.92 6.27 6.27 90009500 2.09 3.14 3.14 2.66 4.13 4.27 2.48 2.88 2.93 3.78 4.10 4.10 5.11 5.63 5.63 950010000 1.71 2.76 2.83 2.18 3.60 3.85 2.17 2.56 2.65 3.31 3.70 3.70 4.41 5.08 5.08 1000010500 1.41 2.42 2.57 1.80 3.14 3.50 1.89 2.30 2.40 2.88 3.35 3.35 3.83 4.61 4.61 1050011000 1.18 2.13 2.34 1.51 2.75 3.19 1.65 2.06 2.19 2.48 3.06 3.06 3.30 4.20 4.20 1100011500 0.99 1.87 2.14 1.27 2.41 2.92 1.45 1.86 2.00 2.13 2.80 2.80 2.83 3.84 3.84 1150012000 0.84 1.64 1.97 1.08 2.11 2.67 1.26 1.68 1.82 1.82 2.55 2.57 2.42 3.52 3.53 1200012500 0.71 1.44 1.81 0.92 1.84 2.41 1.11 1.52 1.67 1.57 2.31 2.37 2.06 3.18 3.25 1250013000 0.61 1.26 1.66 0.79 1.61 2.17 0.98 1.38 1.53 1.35 2.10 2.19 1.77 2.87 3.01 1300013500 0.53 1.10 1.51 0.69 1.40 1.96 0.87 1.25 1.40 1.18 1.91 2.03 1.53 2.59 2.79 1350014000 0.46 0.96 1.36 0.60 1.22 1.77 0.76 1.14 1.29 1.03 1.74 1.89 1.33 2.35 2.59 1400014500 0.40 0.83 1.24 0.52 1.06 1.60 0.67 1.04 1.19 0.90 1.59 1.76 1.16 2.13 2.42 1450015000 0.35 0.73 1.12 0.46 0.93 1.45 0.59 0.95 1.10 0.79 1.45 1.64 1.01 1.93 2.26 15000

TABLE: 1B

Metroll MEGAspan Design Capacity (kN/m) - SINGLE SPAN : INWARD LOAD

Shaded cells denote situations outside Metroll's standard bridging spacing guidelinesB3/SB For Safebridge system always use 3 rows of bridging dataBold Capacities in BOLD & shaded require 8.8 grade bolts

SPAN B0 B1 B2 L/150 B0 B1 B2 L/150 B0 B1 B2 L/150 B0 B1 B2 L/150 B0 B1 B2 L/150 B0 B1 B2 L/150 SPAN3000 4.72 4.72 4.72 4.6 5.97 6.04 6.04 5.8 7.66 8.32 8.32 7.2 9.17 11.32 11.32 9.0 5.34 5.34 5.34 10.2 8.80 8.80 8.80 12.7 30003500 3.47 3.47 3.47 2.9 4.32 4.44 4.44 3.6 5.48 6.11 6.11 4.5 6.51 8.31 8.31 5.7 4.58 4.58 4.58 6.4 6.46 6.46 6.46 8.0 35004000 2.66 2.66 2.66 2.0 3.26 3.40 3.40 2.4 4.10 4.68 4.68 3.0 4.85 6.25 6.37 3.8 3.77 3.83 3.83 4.3 4.95 4.95 4.95 5.4 40004500 2.10 2.10 1.4 2.69 2.69 1.7 3.70 3.70 2.1 4.86 5.03 2.7 3.02 3.02 3.0 3.91 3.91 3.8 45005000 1.70 1.70 1.0 2.18 2.18 1.2 3.00 3.00 1.6 3.88 4.07 1.9 2.45 2.45 2.2 3.17 3.17 2.7 50005500 1.40 1.40 0.8 1.80 1.80 0.9 2.48 2.48 1.2 3.17 3.37 1.5 2.02 2.02 1.7 2.62 2.62 2.1 55006000 1.18 1.18 0.6 1.51 1.51 0.7 2.08 2.08 0.9 2.63 2.81 1.1 1.70 1.70 1.3 2.20 2.20 1.6 60006500 1.01 1.01 0.5 1.29 1.29 0.6 1.77 1.77 0.7 2.22 2.37 0.9 1.45 1.45 1.0 1.87 1.87 1.3 65007000 0.87 0.87 0.4 1.11 1.11 0.5 1.53 1.53 0.6 1.90 2.03 0.7 1.25 1.25 0.8 1.62 1.62 1.0 70007500 0.76 0.76 0.3 0.97 0.97 0.4 1.33 1.33 0.5 1.64 1.75 0.6 1.09 1.09 0.7 1.41 1.41 0.8 75008000 0.66 0.66 0.2 0.85 0.85 0.3 1.17 1.17 0.4 1.43 1.53 0.5 0.96 0.96 0.5 1.24 1.24 0.7 80008500 0.59 0.59 0.2 0.75 0.75 0.3 1.04 1.04 0.3 1.26 1.34 0.4 0.85 0.85 0.4 1.10 1.10 0.6 85009000 0.52 0.52 0.2 0.67 0.67 0.2 0.92 0.92 0.3 1.12 1.19 0.3 0.76 0.76 0.4 0.98 0.98 0.5 90009500 0.47 0.47 0.1 0.60 0.60 0.2 0.83 0.83 0.2 1.00 1.06 0.3 0.68 0.68 0.3 0.88 0.88 0.4 950010000 0.42 0.42 0.1 0.54 0.54 0.2 0.74 0.75 0.2 0.90 0.95 0.2 0.61 0.61 0.3 0.79 0.79 0.3 1000010500 0.39 0.39 0.1 0.49 0.49 0.1 0.67 0.68 0.2 0.81 0.86 0.2 0.56 0.56 0.2 0.72 0.72 0.3 1050011000 0.35 0.35 0.1 0.45 0.45 0.1 0.61 0.62 0.1 0.73 0.78 0.2 0.51 0.51 0.2 0.65 0.65 0.3 1100011500 0.32 0.32 0.1 0.41 0.41 0.1 0.56 0.57 0.1 0.67 0.71 0.2 0.46 0.46 0.2 0.60 0.60 0.2 1150012000 0.30 0.30 0.1 0.38 0.38 0.1 0.51 0.52 0.1 0.61 0.65 0.1 0.43 0.43 0.2 0.55 0.55 0.2 12000

0.39 0.39 0.1 0.51 0.51 0.2 125000.36 0.36 0.1 0.47 0.47 0.2 130000.34 0.34 0.1 0.43 0.43 0.1 135000.31 0.31 0.1 0.40 0.40 0.1 140000.29 0.29 0.1 0.38 0.38 0.1 145000.27 0.27 0.1 0.35 0.35 0.1 15000

SPAN B0 B1 B2 L/150 B0 B1 B2 L/150 B0 B1 B2 L/150 B0 B1 B2 L/150 B0 B1 B2 L/150 B0 B1 B2 L/150 SPAN3000 12.17 12.72 12.72 16.2 15.13 17.49 17.49 20.3 8.12 8.12 8.12 22.5 15.96 16.14 16.14 28.3 19.91 22.47 22.47 35.5 30003500 8.63 9.34 9.34 10.2 10.54 12.85 12.85 12.8 6.96 6.96 6.96 14.1 11.37 11.86 11.86 17.8 13.74 16.51 16.51 22.4 35004000 6.41 7.15 7.15 6.8 7.71 9.84 9.84 8.6 6.09 6.09 6.09 9.5 8.49 9.08 9.08 11.9 9.96 12.64 12.64 15.0 10.42 10.42 10.42 20.8 40004500 5.65 5.65 4.8 7.78 7.78 6.0 5.10 5.10 6.7 7.18 7.18 8.4 9.99 9.99 10.5 9.27 9.27 14.6 45005000 4.58 4.58 3.5 6.30 6.30 4.4 4.13 4.13 4.9 5.81 5.81 6.1 8.09 8.09 7.7 8.15 8.15 10.6 50005500 3.78 3.78 2.6 5.21 5.21 3.3 3.42 3.42 3.6 4.80 4.80 4.6 6.69 6.69 5.8 6.73 6.73 8.0 55006000 3.18 3.18 2.0 4.37 4.37 2.5 2.87 2.87 2.8 4.04 4.04 3.5 5.62 5.62 4.4 5.66 5.66 6.2 60006500 2.71 2.71 1.6 3.70 3.73 2.0 2.45 2.45 2.2 3.44 3.44 2.8 4.79 4.79 3.5 4.82 4.82 4.8 65007000 2.34 2.34 1.3 3.15 3.21 1.6 2.11 2.11 1.8 2.97 2.97 2.2 4.13 4.13 2.8 4.16 4.16 3.9 70007500 2.04 2.04 1.0 2.71 2.80 1.3 1.84 1.84 1.4 2.58 2.58 1.8 3.60 3.60 2.3 3.62 3.62 3.2 75008000 1.79 1.79 0.9 2.36 2.46 1.1 1.62 1.62 1.2 2.27 2.27 1.5 3.16 3.16 1.9 3.17 3.18 2.6 80008500 1.58 1.58 0.7 2.07 2.18 0.9 1.43 1.43 1.0 2.01 2.01 1.2 2.77 2.80 1.6 2.79 2.82 2.2 85009000 1.41 1.41 0.6 1.83 1.94 0.8 1.28 1.28 0.8 1.79 1.79 1.0 2.44 2.50 1.3 2.47 2.52 1.8 90009500 1.27 1.27 0.5 1.62 1.75 0.6 1.15 1.15 0.7 1.61 1.61 0.9 2.17 2.24 1.1 2.20 2.26 1.6 950010000 1.14 1.14 0.4 1.45 1.57 0.5 1.03 1.03 0.6 1.45 1.45 0.8 1.94 2.02 1.0 1.97 2.04 1.3 1000010500 1.04 1.04 0.4 1.31 1.43 0.5 0.94 0.94 0.5 1.32 1.32 0.7 1.75 1.83 0.8 1.78 1.85 1.1 1050011000 0.94 0.95 0.3 1.18 1.29 0.4 0.85 0.85 0.5 1.20 1.20 0.6 1.58 1.67 0.7 1.61 1.68 1.0 1100011500 0.86 0.87 0.3 1.08 1.17 0.4 0.78 0.78 0.4 1.10 1.10 0.5 1.43 1.53 0.6 1.47 1.54 0.9 1150012000 0.78 0.79 0.3 0.98 1.07 0.3 0.72 0.72 0.4 1.01 1.01 0.4 1.31 1.40 0.6 1.34 1.42 0.8 1200012500 0.72 0.73 0.2 0.90 0.98 0.3 0.66 0.66 0.3 0.93 0.93 0.4 1.20 1.29 0.5 1.23 1.30 0.7 1250013000 0.66 0.68 0.2 0.83 0.90 0.2 0.61 0.61 0.3 0.86 0.86 0.3 1.10 1.20 0.4 1.13 1.21 0.6 1300013500 0.62 0.63 0.2 0.76 0.83 0.2 0.57 0.57 0.2 0.80 0.80 0.3 1.02 1.11 0.4 1.05 1.11 0.5 1350014000 0.57 0.58 0.2 0.71 0.77 0.2 0.53 0.53 0.2 0.74 0.74 0.3 0.94 1.03 0.3 0.97 1.03 0.5 1400014500 0.53 0.54 0.1 0.66 0.71 0.2 0.49 0.49 0.2 0.69 0.69 0.3 0.87 0.95 0.3 0.90 0.96 0.4 1450015000 0.50 0.51 0.1 0.61 0.66 0.2 0.46 0.46 0.2 0.65 0.65 0.2 0.81 0.88 0.3 0.84 0.89 0.4 15000

SPAN B0 B1 B2 L/150 B0 B1 B2 L/150 B0 B1 B2 L/150 B0 B1 B2 L/150 B0 B1 B2 L/150 SPAN4000 16.46 17.71 17.71 26.2 21.25 24.09 24.09 32.2 8.87 8.87 8.87 35.6 17.94 17.94 17.94 44.8 31.74 31.74 31.74 55.6 40004500 13.99 13.99 18.4 19.03 19.03 22.6 7.89 7.89 25.0 15.94 15.94 31.5 25.08 25.08 39.1 45005000 11.33 11.33 13.4 15.42 15.42 16.5 7.10 7.10 18.2 14.35 14.35 22.9 20.32 20.32 28.5 50005500 9.37 9.37 10.1 12.74 12.74 12.4 6.45 6.45 13.7 12.22 12.22 17.2 16.79 16.79 21.4 55006000 7.87 7.87 7.8 10.71 10.71 9.5 5.92 5.92 10.6 10.27 10.27 13.3 14.11 14.11 16.5 60006500 6.71 6.71 6.1 9.12 9.12 7.5 5.46 5.46 8.3 8.75 8.75 10.4 12.02 12.02 13.0 65007000 5.78 5.78 4.9 7.86 7.87 6.0 5.07 5.07 6.6 7.55 7.55 8.4 10.37 10.37 10.4 70007500 5.04 5.04 4.0 6.70 6.85 4.9 4.58 4.70 5.4 6.57 6.57 6.8 9.03 9.03 8.4 75008000 4.43 4.43 3.3 5.77 6.02 4.0 3.99 4.13 4.5 5.78 5.78 5.6 7.94 7.94 7.0 80008500 3.92 3.92 2.7 5.00 5.34 3.4 3.50 3.66 3.7 5.12 5.12 4.7 7.03 7.03 5.8 85009000 3.50 3.50 2.3 4.38 4.76 2.8 3.09 3.27 3.1 4.57 4.57 3.9 6.26 6.27 4.9 90009500 3.10 3.14 2.0 3.85 4.27 2.4 2.75 2.93 2.7 4.09 4.10 3.3 5.52 5.63 4.2 950010000 2.77 2.83 1.7 3.41 3.85 2.1 2.46 2.65 2.3 3.65 3.70 2.9 4.90 5.08 3.6 1000010500 2.48 2.57 1.4 3.04 3.50 1.8 2.21 2.39 2.0 3.28 3.35 2.5 4.37 4.61 3.1 1050011000 2.23 2.34 1.3 2.73 3.19 1.5 2.00 2.16 1.7 2.96 3.06 2.2 3.91 4.20 2.7 1100011500 2.02 2.14 1.1 2.46 2.91 1.4 1.82 1.97 1.5 2.68 2.80 1.9 3.52 3.84 2.3 1150012000 1.84 1.97 1.0 2.22 2.64 1.2 1.66 1.80 1.3 2.44 2.57 1.7 3.18 3.53 2.1 1200012500 1.68 1.81 0.9 2.02 2.41 1.1 1.52 1.65 1.2 2.23 2.37 1.5 2.89 3.25 1.8 1250013000 1.54 1.68 0.8 1.84 2.20 0.9 1.39 1.51 1.0 2.04 2.19 1.3 2.63 3.01 1.6 1300013500 1.42 1.56 0.7 1.68 2.01 0.8 1.28 1.39 0.9 1.88 2.03 1.2 2.40 2.79 1.4 1350014000 1.31 1.45 0.6 1.55 1.85 0.8 1.19 1.29 0.8 1.73 1.89 1.0 2.20 2.59 1.3 1400014500 1.21 1.35 0.5 1.42 1.70 0.7 1.10 1.20 0.7 1.60 1.76 0.9 2.03 2.42 1.2 1450015000 1.12 1.26 0.5 1.31 1.58 0.6 1.02 1.11 0.7 1.49 1.64 0.8 1.87 2.24 1.1 15000

InwardCEE / ZED 250 - 24






CEE / ZED 150 - 24Inward






CEE / ZED 150 - 12Outward



CEE / ZED 250 - 24 CEE / ZED 300 - 19




CEE / ZED 200 - 19Outward Outward Outward Outward Outward Outward

CEE / ZED 300 - 24 CEE / ZED 300 - 30 CEE / ZED 350 - 19 CEE / ZED 350 - 24 CEE / ZED 350 - 30

CEE / ZED 200 - 24 CEE / ZED 250 - 15 CEE / ZED 250 - 19

Outward Outward Outward Outward Outward

CEE / ZED 300 - 24 CEE / ZED 300 - 30 CEE / ZED 350 - 19 CEE / ZED 350 - 24 CEE / ZED 350 - 30Inward Inward Inward Inward Inward



Table 1B: Metroll MEGAspan Design Capacity (kN/m) - SINGLE SPAN: INWARD LOADShaded cells denote situations outside Metroll’s standard bridging spacing guidelines. For Safebridge system always use 3 rows of bridging dataCapacities in BOLD & shaded require 8.8 grade bolts

B3/SBBOLD

TABLE: 1A

Metroll MEGAspan Design Capacity (kN/m) - SINGLE SPAN : OUTWARD LOAD

hhB3/SB For Safebridge system always use 3 rows of bridging dataBold Capacities in BOLD & shaded require 8.8 grade bolts


0.10 0.21 0.32 0.13 0.28 0.44 125000.09 0.18 0.28 0.12 0.24 0.39 130000.08 0.16 0.25 0.10 0.21 0.34 135000.07 0.14 0.22 0.09 0.18 0.30 140000.06 0.12 0.20 0.08 0.16 0.26 145000.05 0.11 0.17 0.07 0.14 0.23 15000



TABLE: 1B

Metroll MEGAspan Design Capacity (kN/m) - SINGLE SPAN : INWARD LOAD



0.39 0.39 0.1 0.51 0.51 0.2 125000.36 0.36 0.1 0.47 0.47 0.2 130000.34 0.34 0.1 0.43 0.43 0.1 135000.31 0.31 0.1 0.40 0.40 0.1 140000.29 0.29 0.1 0.38 0.38 0.1 145000.27 0.27 0.1 0.35 0.35 0.1 15000



Inward Inward Inward Inward InwardCEE / ZED 300 - 24 CEE / ZED 300 - 30 CEE / ZED 350 - 19 CEE / ZED 350 - 24 CEE / ZED 350 - 30

























Table 2A: Metroll MEGAspan Design Capacity (kN/m) - 2 SPAN CONTINUOUS: OUTWARD LOADShaded cells denote situations outside Metroll’s standard bridging spacing guidelines. For Safebridge system always use 3 rows of bridging dataCapacities in BOLD & shaded require 8.8 grade bolts

B3/SBBOLD

TABLE: 2A

Metroll MEGAspan Design Capacity (kN/m) - 2 SPAN CONTINUOUS (UNLAPPED) : OUTWARD LOAD



0.25 0.35 0.39 0.34 0.49 0.51 125000.22 0.32 0.36 0.29 0.44 0.47 130000.19 0.29 0.33 0.26 0.40 0.43 135000.17 0.26 0.30 0.22 0.36 0.40 140000.15 0.23 0.28 0.20 0.32 0.38 145000.13 0.21 0.25 0.17 0.29 0.35 15000



TABLE: 2B

Metroll MEGAspan Design Capacity (kN/m) - 2 SPAN CONTINUOUS (UNLAPPED) : INWARD LOAD



0.39 0.39 0.3 0.51 0.51 0.4 125000.35 0.36 0.3 0.47 0.47 0.4 130000.32 0.34 0.3 0.43 0.43 0.3 135000.30 0.31 0.2 0.40 0.40 0.3 140000.27 0.29 0.2 0.37 0.38 0.3 145000.25 0.27 0.2 0.34 0.35 0.2 15000


















CEE / ZED 250 - 24 CEE / ZED 300 - 19











Table 2B: Metroll MEGAspan Design Capacity (kN/m) - 2 SPAN CONTINUOUS: INWARD LOADShaded cells denote situations outside Metroll’s standard bridging spacing guidelines. For Safebridge system always use 3 rows of bridging dataCapacities in BOLD & shaded require 8.8 grade bolts

B3/SBBOLD

TABLE: 2A

Metroll MEGAspan Design Capacity (kN/m) - 2 SPAN CONTINUOUS (UNLAPPED) : OUTWARD LOAD



0.25 0.35 0.39 0.34 0.49 0.51 125000.22 0.32 0.36 0.29 0.44 0.47 130000.19 0.29 0.33 0.26 0.40 0.43 135000.17 0.26 0.30 0.22 0.36 0.40 140000.15 0.23 0.28 0.20 0.32 0.38 145000.13 0.21 0.25 0.17 0.29 0.35 15000



TABLE: 2B

Metroll MEGAspan Design Capacity (kN/m) - 2 SPAN CONTINUOUS (UNLAPPED) : INWARD LOAD



0.39 0.39 0.3 0.51 0.51 0.4 125000.35 0.36 0.3 0.47 0.47 0.4 130000.32 0.34 0.3 0.43 0.43 0.3 135000.30 0.31 0.2 0.40 0.40 0.3 140000.27 0.29 0.2 0.37 0.38 0.3 145000.25 0.27 0.2 0.34 0.35 0.2 15000




























Shaded cells denote situations outside Metroll’s standard bridging spacing guidelines. For Safebridge system always use 3 rows of bridging dataCapacities in BOLD & shaded require 8.8 grade bolts

B3/SBBOLD

TABLE: 3A

Metroll MEGAspan Design Capacity (kN/m) - 2 SPAN LAPPED : OUTWARD LOAD



0.31 0.44 0.51 0.41 0.61 0.69 125000.27 0.39 0.46 0.35 0.54 0.63 130000.23 0.35 0.42 0.31 0.48 0.58 135000.20 0.31 0.38 0.27 0.42 0.53 140000.18 0.28 0.35 0.23 0.37 0.48 145000.16 0.24 0.31 0.20 0.33 0.43 15000



TABLE: 3B

Metroll MEGAspan Design Capacity (kN/m) - 2 SPAN LAPPED : INWARD LOAD



0.48 0.53 0.4 0.65 0.69 0.5 125000.44 0.48 0.3 0.59 0.63 0.4 130000.40 0.44 0.3 0.53 0.59 0.4 135000.36 0.41 0.3 0.48 0.55 0.3 140000.33 0.37 0.2 0.44 0.51 0.3 145000.30 0.34 0.2 0.40 0.47 0.3 15000


















CEE / ZED 250 - 24 CEE / ZED 300 - 19









Table 3A: Metroll MEGAspan Design Capacity (kN/m) - 2 SPAN LAPPED: OUTWARD LOAD




B3/SBBOLD

TABLE: 3A




0.31 0.44 0.51 0.41 0.61 0.69 125000.27 0.39 0.46 0.35 0.54 0.63 130000.23 0.35 0.42 0.31 0.48 0.58 135000.20 0.31 0.38 0.27 0.42 0.53 140000.18 0.28 0.35 0.23 0.37 0.48 145000.16 0.24 0.31 0.20 0.33 0.43 15000



TABLE: 3B




0.48 0.53 0.4 0.65 0.69 0.5 125000.44 0.48 0.3 0.59 0.63 0.4 130000.40 0.44 0.3 0.53 0.59 0.4 135000.36 0.41 0.3 0.48 0.55 0.3 140000.33 0.37 0.2 0.44 0.51 0.3 145000.30 0.34 0.2 0.40 0.47 0.3 15000


























Table 3B: Metroll MEGAspan Design Capacity (kN/m) - 2 SPAN LAPPED: INWARD LOAD




B3/SBBOLD

TABLE: 4A




0.26 0.42 0.54 0.33 0.56 0.75 125000.22 0.37 0.49 0.29 0.49 0.67 130000.19 0.32 0.43 0.25 0.42 0.59 135000.17 0.28 0.39 0.22 0.37 0.53 140000.15 0.24 0.35 0.19 0.32 0.46 145000.13 0.22 0.31 0.17 0.28 0.41 15000



TABLE: 4B




0.59 0.64 0.3 0.79 0.82 0.4 125000.54 0.59 0.3 0.72 0.76 0.3 130000.49 0.54 0.2 0.66 0.71 0.3 135000.45 0.50 0.2 0.60 0.66 0.3 140000.41 0.46 0.2 0.55 0.61 0.2 145000.37 0.42 0.2 0.50 0.57 0.2 15000


















CEE / ZED 250 - 24 CEE / ZED 300 - 19









Table 4A: Metroll MEGAspan Design Capacity (kN/m) - 3 SPAN LAPPED: OUTWARD LOAD




B3/SBBOLD

TABLE: 4A




0.26 0.42 0.54 0.33 0.56 0.75 125000.22 0.37 0.49 0.29 0.49 0.67 130000.19 0.32 0.43 0.25 0.42 0.59 135000.17 0.28 0.39 0.22 0.37 0.53 140000.15 0.24 0.35 0.19 0.32 0.46 145000.13 0.22 0.31 0.17 0.28 0.41 15000



TABLE: 4B




0.59 0.64 0.3 0.79 0.82 0.4 125000.54 0.59 0.3 0.72 0.76 0.3 130000.49 0.54 0.2 0.66 0.71 0.3 135000.45 0.50 0.2 0.60 0.66 0.3 140000.41 0.46 0.2 0.55 0.61 0.2 145000.37 0.42 0.2 0.50 0.57 0.2 15000


























Table 4B: Metroll MEGAspan Design Capacity (kN/m) - 3 SPAN LAPPED: INWARD LOAD


DESIGN CAPACITY TABLESDESIGN CAPACITY TABLES

Table 5A: Metroll MEGAspan Design Capacity (kN/m) - 5 SPAN LAPPED: OUTWARD LOADShaded cells denote situations outside Metroll’s standard bridging spacing guidelines. For Safebridge system always use 3 rows of bridging dataCapacities in BOLD & shaded require 8.8 grade bolts

B3/SBBOLD

Span (mm)



Span (mm) Span (mm)


Span (mm)Span (mm)






0.27 0.44 0.55 0.35 0.58 0.76 125000.23 0.38 0.49 0.30 0.50 0.68 130000.20 0.33 0.44 0.26 0.44 0.60 135000.18 0.29 0.39 0.23 0.38 0.54 140000.15 0.25 0.35 0.20 0.34 0.48 145000.14 0.22 0.32 0.17 0.29 0.42 15000






CEE / ZED 250 - 24 CEE / ZED 300 - 19









DESIGN CAPACITY TABLESDESIGN CAPACITY TABLES


0.59 0.63 0.3 0.79 0.82 0.4 125000.53 0.58 0.3 0.72 0.76 0.3 130000.49 0.53 0.2 0.65 0.70 0.3 135000.45 0.49 0.2 0.60 0.65 0.3 140000.41 0.45 0.2 0.55 0.61 0.2 145000.37 0.41 0.2 0.50 0.57 0.2 15000
















Table 5B: Metroll MEGAspan Design Capacity (kN/m) - 5 SPAN LAPPED: INWARD LOADShaded cells denote situations outside Metroll’s standard bridging spacing guidelines. For Safebridge system always use 3 rows of bridging dataCapacities in BOLD & shaded require 8.8 grade bolts

B3/SBBOLD

Span (mm)



Span (mm) Span (mm)


Span (mm)Span (mm)






BRIDGING SYSTEM

CLAMP PLATE

ANGLE CONNECTOR

GENERAL PURPOSE BRACKET

Basic ComponentryAll Metroll componentry is manufactured from zinc coatedsteel and forms an integral part of the Metroll Purlin and Girtsystem.

Typical Assemblies

Clamp Plate and AngleConnector as a trimmer todoor head connection

Clamp Plate and Angle Connector for girt connection

Clamp Plate and Angle Connector as a foot connection

Clamp Plate(2 bolts)

Raking Girt Bracketand Clamp Plate(4 bolts)

Fascia purlin

b c d e h k

100 90 - - - 1@60x17 1@60x17

150 140 33 74 37 3@30x17 2@30x17

200 190 40 110 55 3@30x17 2@30x17

250 240 40 160 57 4@30x17 2@30x17

b c d e h

100 25 90 40 - 20x17

150 40 140 60 37 30x17

200 40 190 110 55 30x17

250 40 240 160 57 30x17

c

ce

e

b

6565

hk

d35

35

75

b

b

c

h

d

185

13586

4090

106

17

17

RAKING GIRT BRACKET

a b c d e h

100 60 110 70 40 50 20x17

150 60 125 110 60 65 30x17

200 60 135 160 110 75 30x17

250 65 135 210 160 75 30x17

100 0nly

cd

b

a

h

e

3535

Met - Lock BridgingMet-Lock Bridging by Metroll is an uncomplicatedproprietary system developed for fast installation andoptimum compatibility with Metroll Purlins and Girts.

Met-Lock Bridging can be installed in a number of ways.The usual methodology used is to commence installationat the Fascia and proceed up the roof slope to the ridge.

The system consists of solid bridging assemblies betweenpurlins / girts and adjustable bridging assemblies atlocations such as ridges, eaves and the bottom of girts (girt foot).

Purlins display two types of lateral instability: Lateraldeflection and twist (rotation and roll). It is necessary tocontrol these instabilities by providing suitable bracing as close as possible to the flanges of the section.

Bracing can be continuous (cladding fastened to the flange)or point braced at the midspan region or at several points onthe midspan region. Point bracing is required to stabilize andstraighten the purlins and girts prior to the fixing of claddingin order to facilitate the fixing operation.

Common point bracing types are ‘ties’ and ‘bridging’ ties canbe loaded in tension only. Because they are solid members,Met-Lock Bridging secured to the web of purlins and girtscan be loaded in tension, compression and bending.

For this reason, a continuous run of bridging is the mosteffective stabilizer for both wall and roof. It is also the mostwidely accepted by design engineers.

The Met-Lock componentry is simple yet robust andinstallers do not have to worry about additional clips or ends that distort upon the slightest impact. The locators and Clamps have hook centres to match the holespunched in the corresponding purlins and girts.

The following diagrams illustrate the components forthe various bridging applications likely encountered.

150 110 - 110 65 2@80x14 2@19x14

200/260 160 80 190 135 4@65x14 2@39x14

a b f g h k

FASCIA BRACKET

2 hole 130

3 hole 190

5 hole 310

SLOTTED CHANNELa

100 60

150 80*

200 130

250 180

cut to lengthwith a hole at each end

135

fg

20k

a b

5

h

2040

*90 in Victoria

*85 in Victoria

100 55

150 75*

200 125

250 175

LOCATOR ENDa (nominal)

CLAMP ENDa (nominal)

CHANNEL

TURNBUCKLE

35

70 nominal

30 nominala

60

65 nominal

50x14

30 nominal

270-420

a

a


CLAMP PLATE

ANGLE CONNECTOR

GENERAL PURPOSE BRACKET

Basic ComponentryAll Metroll componentry is manufactured from zinc coatedsteel and forms an integral part of the Metroll Purlin and Girtsystem.

Typical Assemblies

Clamp Plate and AngleConnector as a trimmer todoor head connection

Clamp Plate and Angle Connector for girt connection

Clamp Plate and Angle Connector as a foot connection

Clamp Plate(2 bolts)

Raking Girt Bracketand Clamp Plate(4 bolts)

Fascia purlin

b c d e h k

100 90 - - - 1@60x17 1@60x17

150 140 33 74 37 3@30x17 2@30x17

200 190 40 110 55 3@30x17 2@30x17

250 240 40 160 57 4@30x17 2@30x17

b c d e h

100 25 90 40 - 20x17

150 40 140 60 37 30x17

200 40 190 110 55 30x17

250 40 240 160 57 30x17

c

ce

e

b

6565

hk

d35

35

75

b

b

c

h

d

185

13586

4090

106

17

17

RAKING GIRT BRACKET

a b c d e h

100 60 110 70 40 50 20x17

150 60 125 110 60 65 30x17

200 60 135 160 110 75 30x17

250 65 135 210 160 75 30x17

100 0nly

cd

b

a

h

e

3535

BRIDGING SYSTEM

Met - Lock BridgingMet-Lock Bridging by Metroll is an uncomplicatedproprietary system developed for fast installation andoptimum compatibility with Metroll Purlins and Girts.

Met-Lock Bridging can be installed in a number of ways.The usual methodology used is to commence installationat the Fascia and proceed up the roof slope to the ridge.

The system consists of solid bridging assemblies betweenpurlins / girts and adjustable bridging assemblies atlocations such as ridges, eaves and the bottom of girts (girt foot).

Purlins display two types of lateral instability: Lateraldeflection and twist (rotation and roll). It is necessary tocontrol these instabilities by providing suitable bracing as close as possible to the flanges of the section.

Bracing can be continuous (cladding fastened to the flange)or point braced at the midspan region or at several points onthe midspan region. Point bracing is required to stabilize andstraighten the purlins and girts prior to the fixing of claddingin order to facilitate the fixing operation.

Common point bracing types are ‘ties’ and ‘bridging’ ties canbe loaded in tension only. Because they are solid members,Met-Lock Bridging secured to the web of purlins and girtscan be loaded in tension, compression and bending.

For this reason, a continuous run of bridging is the mosteffective stabilizer for both wall and roof. It is also the mostwidely accepted by design engineers.

The Met-Lock componentry is simple yet robust andinstallers do not have to worry about additional clips or ends that distort upon the slightest impact. The locators and Clamps have hook centres to match the holespunched in the corresponding purlins and girts.

The following diagrams illustrate the components forthe various bridging applications likely encountered.

150 110 - 110 65 2@80x14 2@19x14

200/260 160 80 190 135 4@65x14 2@39x14

a b f g h k

FASCIA BRACKET

2 hole 130

3 hole 190

5 hole 310

SLOTTED CHANNELa

100 60

150 80*

200 130

250 180

cut to lengthwith a hole at each end

135

fg

20k

a b

5

h

2040

*90 in Victoria

*85 in Victoria

100 55

150 75*

200 125

250 175

LOCATOR ENDa (nominal)

CLAMP ENDa (nominal)

CHANNEL

TURNBUCKLE

35

70 nominal

30 nominala

60

65 nominal

50x14

30 nominal

270-420

a

a


BRIDGING SYSTEM

Intermediate BridgingIntermediate Bridging is the basic connecting memberbetween purlins and generally comprises a locator end anda clamp end attached to cut-to-length plain channel. Allbridging lengths should be centre to centre dimensionsMetroll computer deducts the purlin thickness to ensurethe correct spacing is manufactured.A.1 IBLC - Intermediate Bridging Locator / Clamp

B.1 IBLB - Intermediate Bridging Locator / Bolt

C.1 IBCC - Intermediate Bridging Clamp / Clamp

D.1 IBCB - Intermediate Bridging Clamp / Bolt

E.1 IBBB - Intermediate Bridging Bolted / Bolted

Fascia BridgingFascia Bridging is used to provide support to the firstinternal purlin and for straightening and securing the FasciaPurlin. The standard combination consists of a fasciabracket, slotted channel, plain channel and a locator end.

Expansion Joint BridgingExpansion Joint bridging is used to accommodate a step orjoint in the roof plane and is often nominated as anadjustable or swivel assembly. Variations of combinationsare illustrated below.A.1 Alternative - Swivel Ends

B.1 Alternative - Adjustable

C.1 Alternative - Slotted Channel

Locator End

Clamp End

Plain Channel

Plain Channel

Locator End

Bolted Bracket

Plain Channel

Clamp End

Clamp End

Clamp End

Plain Channel

Bolted Bracket

Bolted Bracket

Bolted Bracket

Plain Channel

Locator End

Plain Channel

Slotted Channel

Fascia Bracket

Locator End

Plain Channel

Clamp End

Locator End

Plain Channel

Clamp EndSlotted Channel

Slotted Channel

Locator End

Clamp End

Tie Rod BridgingTie Rod bridging is a light duty, versatile applicationcommonly used for alignment and adjustment. This bridgingmay be used anywhere a bolted end is used but is notsuitable for sustaining compressive loads.

Ridge BridgingLike all Met-Lock bridging the Ridge Tie or Ridge Bridging issimple and efficient. As the terminology implies this bridgingis used at the apex of the roof and is usually adjustable.Several alternatives are illustrated.

A.1 Alternative - Turnbuckle

B.1 Alternative - Turnbuckle with Channel

C.1 Alternative - Swivel Ends with Channel

D.1 Alternative - Cranked tie Rod (Bolted Ends)

Girt BridgingGirt bridging is usually made up of the followingcomponents: An adjustable girt foot, intermediate bridgingand a girt hanger. The recommended procedure forinstallation is required. It is recommended that the followingprecautions be taken during construction.

1. The roof sheeting should be installed before theturnbuckle of the girt hanger is used to level the girtswhich would impose loads on the fascia system: and

2. Provide a temporary girt support under the bottom girtuntil the installation of wall cladding is complete.

Girt FootGirt foot assemblies are used to transfer downward forces ingirt bridging to the floor. They also provide some adjustmentand alignment to the bottom purlin.

Girt HangerPrimarily used to assist in alignment and stabilization. Thegirt hanger is usually attached to the slotted channel in theFascia Bridging assembly by a turnbuckle. Girt Hangersshould not be used to suspend the wall girts.

Clamp End

Clamp End

Turnbuckle

Clamp End

Turnbuckle

Clamp End

Plain Channel

Clamp End

Clamp End

Plain Channel

Bolted Bracket

Bolted Bracket

Cranked Tie Rod

Angle Connector

Slotted Channel

Locator End

Slotted Channel

Clamp End

Turnbuckle


Intermediate BridgingIntermediate Bridging is the basic connecting memberbetween purlins and generally comprises a locator end anda clamp end attached to cut-to-length plain channel. Allbridging lengths should be centre to centre dimensionsMetroll computer deducts the purlin thickness to ensurethe correct spacing is manufactured.A.1 IBLC - Intermediate Bridging Locator / Clamp

B.1 IBLB - Intermediate Bridging Locator / Bolt

C.1 IBCC - Intermediate Bridging Clamp / Clamp

D.1 IBCB - Intermediate Bridging Clamp / Bolt

E.1 IBBB - Intermediate Bridging Bolted / Bolted

Fascia BridgingFascia Bridging is used to provide support to the firstinternal purlin and for straightening and securing the FasciaPurlin. The standard combination consists of a fasciabracket, slotted channel, plain channel and a locator end.

Expansion Joint BridgingExpansion Joint bridging is used to accommodate a step orjoint in the roof plane and is often nominated as anadjustable or swivel assembly. Variations of combinationsare illustrated below.A.1 Alternative - Swivel Ends

B.1 Alternative - Adjustable

C.1 Alternative - Slotted Channel

Locator End

Clamp End

Plain Channel

Plain Channel

Locator End

Bolted Bracket

Plain Channel

Clamp End

Clamp End

Clamp End

Plain Channel

Bolted Bracket

Bolted Bracket

Bolted Bracket

Plain Channel

Locator End

Plain Channel

Slotted Channel

Fascia Bracket

Locator End

Plain Channel

Clamp End

Locator End

Plain Channel

Clamp EndSlotted Channel

Slotted Channel

Locator End

Clamp End

BRIDGING SYSTEM

Tie Rod BridgingTie Rod bridging is a light duty, versatile applicationcommonly used for alignment and adjustment. This bridgingmay be used anywhere a bolted end is used but is notsuitable for sustaining compressive loads.

Ridge BridgingLike all Met-Lock bridging the Ridge Tie or Ridge Bridging issimple and efficient. As the terminology implies this bridgingis used at the apex of the roof and is usually adjustable.Several alternatives are illustrated.

A.1 Alternative - Turnbuckle

B.1 Alternative - Turnbuckle with Channel

C.1 Alternative - Swivel Ends with Channel

D.1 Alternative - Cranked tie Rod (Bolted Ends)

Girt BridgingGirt bridging is usually made up of the followingcomponents: An adjustable girt foot, intermediate bridgingand a girt hanger. The recommended procedure forinstallation is required. It is recommended that the followingprecautions be taken during construction.

1. The roof sheeting should be installed before theturnbuckle of the girt hanger is used to level the girtswhich would impose loads on the fascia system: and

2. Provide a temporary girt support under the bottom girtuntil the installation of wall cladding is complete.

Girt FootGirt foot assemblies are used to transfer downward forces ingirt bridging to the floor. They also provide some adjustmentand alignment to the bottom purlin.

Girt HangerPrimarily used to assist in alignment and stabilization. Thegirt hanger is usually attached to the slotted channel in theFascia Bridging assembly by a turnbuckle. Girt Hangersshould not be used to suspend the wall girts.

Clamp End

Clamp End

Turnbuckle

Clamp End

Turnbuckle

Clamp End

Plain Channel

Clamp End

Clamp End

Plain Channel

Bolted Bracket

Bolted Bracket

Cranked Tie Rod

Angle Connector

Slotted Channel

Locator End

Slotted Channel

Clamp End

Turnbuckle


BRIDGING SYSTEM

35

Large BridgingMetroll’s Large Bridging is for Metroll’s Large purlin range(C/Z300, C/Z350 and C/Z400 series). Like its smallercousin, Met-Lock, the heavy duty range is simple and veryeasy to install. The components are larger because thesections are more substantial.

Generally the bridging channel is C150 section firmly boltedto end plates at 900. If a particular angle is required atbridging ends they must be specified at time of order.Additional costs may be applied for angles other than 900

due to set up and template costs.

Basic Components

Typical Connections

Used as bridging channel

120

85

60

ø14

ø18

32

ab

250 210 160

300 260 210

350 310 260

400 360 310

a b

LARGE SERIES END PLATE

C150 PURLIN

Bridging InstallationThe following steps are a recommendation for the safe,practical installation of Metroll’s Met-Lock Bridging systems.Procedures will vary from State to State but standardpractice is to commence purlin installation at the Fascia andwork up the roof slope to the Ridge line.

A typical installation procedure is:

Step 1: Install the fascia bridging assembly by inserting thelocator end into the holes of the first purlin and bolting thefascia bracket to the fascia purlin. Adjust the slotted channelto straighten fascia and bolt firmly.

Step 2: Install the intermediate, locator / clamp bridging upthe roof slope and finish at the ridge. Intermediate bridgingis installed by fitting the clamp end (the straight bracket)over the previously installed locator (the cranked bracket)and swinging the bridging piece around until the locatorengages in the holes of the next purlin.

Step 3: If applicable, repeat Step 1 and 2 for the oppositeside of the roof. For a neat tradesman like appearance,bridging pieces should face the same direction.

Step 4: Install the ridge assembly by fitting the clamp endsover the previously installed locator ends and then tightenthe bolts or turnbuckle of the ridge assembly.

If a ridge assembly is not used, the last piece ofIntermediate Bridging should end in a bolted bracket(accommodates a Sag Rod if required at a later date).Alternately the standard bridging can be secured intoposition by installing a bolt beside the previously installedlocator.

Fix Fascia Bridging

Insert Intermediate Bridging

Fix Ridge Bridging

Adjust Fascia Bridging

Fascia BracketSlotted Channel

Plain Channel

Locator Insert Locator Endbefore bolting to Fascia Channel

LocatorEnd

LocatorEnd

Clamp End

Repeat for subsequent bridging

Locator End

Clamp EndClamp End

Locator End

Adjust turnbuckle to pull purlins into line

Fascia purlin

Adjust twist

Adjust straightness

Fit the clamp end over theinstalled locator and swing thebridging piece around until thelocator engages the holes of thenext purlin.


35

Large BridgingMetroll’s Large Bridging is for Metroll’s Large purlin range(C/Z300, C/Z350 and C/Z400 series). Like its smallercousin, Met-Lock, the heavy duty range is simple and veryeasy to install. The components are larger because thesections are more substantial.

Generally the bridging channel is C150 section firmly boltedto end plates at 900. If a particular angle is required atbridging ends they must be specified at time of order.Additional costs may be applied for angles other than 900

due to set up and template costs.

Basic Components

Typical Connections

Used as bridging channel

120

85

60

ø14

ø18

32

ab

250 210 160

300 260 210

350 310 260

400 360 310

a b

LARGE SERIES END PLATE

C150 PURLIN

BRIDGING SYSTEM

Bridging InstallationThe following steps are a recommendation for the safe,practical installation of Metroll’s Met-Lock Bridging systems.Procedures will vary from State to State but standardpractice is to commence purlin installation at the Fascia andwork up the roof slope to the Ridge line.

A typical installation procedure is:

Step 1: Install the fascia bridging assembly by inserting thelocator end into the holes of the first purlin and bolting thefascia bracket to the fascia purlin. Adjust the slotted channelto straighten fascia and bolt firmly.

Step 2: Install the intermediate, locator / clamp bridging upthe roof slope and finish at the ridge. Intermediate bridgingis installed by fitting the clamp end (the straight bracket)over the previously installed locator (the cranked bracket)and swinging the bridging piece around until the locatorengages in the holes of the next purlin.

Step 3: If applicable, repeat Step 1 and 2 for the oppositeside of the roof. For a neat tradesman like appearance,bridging pieces should face the same direction.

Step 4: Install the ridge assembly by fitting the clamp endsover the previously installed locator ends and then tightenthe bolts or turnbuckle of the ridge assembly.

If a ridge assembly is not used, the last piece ofIntermediate Bridging should end in a bolted bracket(accommodates a Sag Rod if required at a later date).Alternately the standard bridging can be secured intoposition by installing a bolt beside the previously installedlocator.

Fix Fascia Bridging

Insert Intermediate Bridging

Fix Ridge Bridging

Adjust Fascia Bridging

Fascia BracketSlotted Channel

Plain Channel

Locator Insert Locator Endbefore bolting to Fascia Channel

LocatorEnd

LocatorEnd

Clamp End

Repeat for subsequent bridging

Locator End

Clamp EndClamp End

Locator End

Adjust turnbuckle to pull purlins into line

Fascia purlin

Adjust twist

Adjust straightness

Fit the clamp end over theinstalled locator and swing thebridging piece around until thelocator engages the holes of thenext purlin.


BRIDGING SYSTEM

Girt BridgingThe recommended procedure is to commence at floor leveland work up the wall towards the fascia or eave. A typicalinstallation procedure is:

Step 1: Install the girt foot assembly by engaging the locatorinto the appropriate holes in the bottom girt. Due to thetransference of loads, girt feet assemblies must be anchoredto the slab.

Step 2: Adjust the girt foot assembly to level the bottom girt.Where the slab has not been poured or a girt foot notspecified, the bottom purlin must be temporarily supportedto keep the bottom purlin level.

Angle Connector

Slotted Channel

Locator End


Girt BridgingThe recommended procedure is to commence at floor leveland work up the wall towards the fascia or eave. A typicalinstallation procedure is:

Step 1: Install the girt foot assembly by engaging the locatorinto the appropriate holes in the bottom girt. Due to thetransference of loads, girt feet assemblies must be anchoredto the slab.

Step 2: Adjust the girt foot assembly to level the bottom girt.Where the slab has not been poured or a girt foot notspecified, the bottom purlin must be temporarily supportedto keep the bottom purlin level.

Angle Connector

Slotted Channel

Locator End

BRIDGING SYSTEM


Notes


DISCLAIMER

Metroll Pty Ltd. ABN 97 001 446 439. All reasonable care has been taken in the compilation of the information contained in this brochure. All recommendations on the use of our products are made without guarantee as conditions of use are beyond the control of Metroll Pty Ltd. It is the customers responsibility to ensure that the product is fit for its intended purpose and that the actual conditions of use are suitable. Metroll Pty Ltd, pursues a policy of continuous development and reserves the right to amend specifications without prior notice. The Metroll M and Logo are registered trademarks of Metroll Pty Ltd.


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PURLIN & GIRT DESIGN MANUAL - Metroll® Purlin & Girt Design Manual 010117 3 Metroll MEGASPAN®...

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Transcript of PURLIN & GIRT DESIGN MANUAL - Metroll® Purlin & Girt Design Manual 010117 3 Metroll MEGASPAN®...